I have my Zumo 396 connected to my headset and the headset also connects to the Freewire on my bike. It works OK except the Zumo connection has lots of static and it is much louder than the Freewire. Does anyone know an easy way to turn down the volume on the driving directions from the Zumo? If it had a bluetooth audio out volume control, that would do the trick, but when doing bluetooth, the volume control is disabled. Any good ideas?